STS083-305-006 (4-8 April 1997) --- Astronaut Michael L. Gernhardt, mission specialist, talks to ground controllers while temporarily occupying the commander's station on the forward flight deck of the Earth-orbiting Space Shuttle Columbia. Crewed by Gernhardt, four other NASA astronauts and two payload specialists, the scheduled 16-day Microgravity Science Mission (MSL-1) mission was later cut short by a power shortage.